The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 08, 1987
Filed:
Jul. 07, 1986
Yoji Miyasako, Yokohama, JP;
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Abstract
This invention is described a current mirror circuit. In a current mirror circuit wherein there are provided first and second transistors which have their emitters in common and constitute a differential amplification circuit, third and fourth transistors which have their bases in common, emitters of the first and second transistors are coupled with a constant current source, a collector of the second transistor is coupled with bases of the third and fourth transistors, a collector of the third transistor is coupled with a base of the first transistor and an input current source, a base of the second transistor is coupled with a bias node, emitters of the third and fourth transistors are coupled with a reference power source, a collector of the fourth transistor is coupled with an output node, a collector of the first transistor is coupled with the reference power source through a load resistance, and a capacitor for coupling the base and the collector of the first transistor each other.